S-91251A535 1/4"-20 x 3/8" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
- Precise Class 3A thread fit provides superior engagement and vibration resistance, minimizing loosening in dynamic applications.
- Black-oxide finish on alloy steel offers enhanced corrosion resistance and a durable, non-galling surface for extended service life.
- Hex socket drive design allows for high torque application and easy installation in confined spaces with standard 3/16" hex keys.
- Fully threaded UNC coarse thread enables quick assembly and strong holding power in a wide range of materials.
- Compliance with ASTM A574 guarantees consistent quality and mechanical properties for critical engineering applications.
- RoHS 3 and REACH compliance ensures environmental safety and regulatory acceptance for global industrial use.
Professional Applications & Engineering Value
This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address common industrial challenges such as vibration-induced loosening and corrosion in harsh environments. The alloy steel construction, combined with a Rockwell C37 hardness, provides excellent wear resistance and durability, making it ideal for heavy machinery, automotive assemblies, and precision equipment. The 1/4"-20 UNC coarse thread ensures rapid installation and reliable clamping force, while the hex drive design facilitates secure tightening in limited-access areas. These screws are particularly valuable in applications requiring high tensile strength and consistent performance under dynamic loads, reducing maintenance needs and downtime.
Specification Summary & Compliance
This socket head cap screw features a 1/4"-20 UNC thread with Class 3A fit for precise tolerance, ensuring secure fastening. It is manufactured in accordance with ASTM A574 specifications, guaranteeing high strength and reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting environmental and safety standards for industrial use.
